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Parkinson's disease is a progressive disorder of the nervous system that affects movement — tremor, stiffness, and slowed motion. It is one of the conditions the VA presumes is linked to Agent Orange exposure.
VA rating schedule, diagnostic code 8004
The VA treats Parkinson's disease as a neurological condition. It is rated under the schedule for neurological conditions in 38 CFR § 4.124a, using Diagnostic Code 8004, which the rules call "paralysis agitans." When a veteran has clear, ascertainable residuals from the disease, the VA assigns a minimum rating of 30 percent, and the rating can scale higher from there. The rules say disabilities from these conditions are rated in proportion to how much they affect motor, sensory, or mental function, and residuals such as tremor, stiffness, or trouble walking can be rated under the related diagnostic codes 8000 through 8025. So what the VA looks at is not just the diagnosis, but how the symptoms actually affect the person.
Parkinson's disease also has a special pathway tied to exposure. Under 38 CFR § 3.309(e), it is on the list of conditions the VA presumes are connected to certain herbicide agents, such as Agent Orange. In plain terms, if a veteran was exposed to a qualifying herbicide agent during service and meets the requirements in 38 CFR § 3.307, the VA can presume the Parkinson's disease is service-connected even without a record of it during service. This presumption is rebuttable, meaning the VA still applies the conditions set out in those rules.
This is general educational information about how the VA's rules work — not legal advice, not a VA decision, and not a prediction about any individual claim. Outcomes depend on your own facts and evidence; a denial can be appealed.
Grounded in federal regulations and VA guidance, independently reviewed June 2026. Educational information, not legal advice or a VA determination.
Across 4,413 real Board appeals for Parkinson's disease
A denial is often not the end either — remands (shown below) are sent back for more development and can still end in a grant. These are historical outcomes, not a prediction of your case.
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Among the appeals that were granted or partly granted, the most common ways Parkinson's disease was linked to service:
In appeals where Parkinson's disease was the only condition decided and the Board granted it, the rating most often assigned was:
These appeals involved a recognized exposure — which can mean the link to service is presumed, with no nexus to prove:
The Veteran is granted special monthly compensation (SMC) at the (o) rate and SMC at the (r)(2) rate, effective January 19, 2025. The decision finds that the Veteran's service-connected conditions warrant these awards due to his need for aid and attendance.
The Board has granted service connection for Parkinsonism, finding that the Veteran's condition is related to his military service. The decision resolves all doubts in favor of the claim.
The Board has granted service connection for Parkinsonism, finding that the Veteran's condition is related to his military service. The decision resolves all doubts in favor of the claim.
The Veteran's service-connected conditions, including Parkinson's disease and related disabilities of the upper and lower extremities, have caused loss of use in both hands and need for aid and attendance due to his lower extremity disability, kidney disease, and neurogenic bladder. The Board has granted SMC based on these findings.
The Board has granted service connection for lumbosacral strain with degenerative disc disease, headaches, an acquired psychiatric disorder (other specified trauma and stressor related disorder and PTSD), and Parkinson's disease. The conditions are presumed to be due to exposure in service.,Service connection is established for all four claimed conditions.
The Veteran's need for regular aid and assistance of another person due to service-connected disabilities has been established, allowing him to receive special monthly compensation at the aid and attendance rate.
Jump to the decisions from a specific year.
New decisions are added every week, and older years are actively being backfilled — a year that looks thin or missing here (especially 2011–2017) is a gap in our library, not in the Board’s decisions.
Veterans appealing Parkinson's disease often look at outcomes for these too:
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This is general information, not legal advice. For advice about your own situation, talk to a VA-accredited representative — many help for free.